Wafer



FIG. 1 is a perspective view of a wafer embodying my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a side perspective view of a second embodiment of a wafer embodying my new design;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The broken lines shown in the drawings are for the purpose of illustrating unclaimed portions of the wafer and form no part of the claimed design. 

The ornamental design for a wafer, as shown and described. 